Cathode for a magnetron having primary and secondary electron emitters
US6005347A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 6, 1996 |
| Grant date | Dec 21, 1999 |
| Priority date | — |
| Expiry date | Dec 6, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J23/05
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved magnetron which is capable of elongating the life span of the magnetron, reducing the fabrication cost, and enhancing the performance of the system without using a filament in the conventional art, which includes a center lead, an upper end shield engaged to an upper portion of the center lead for preventing thermal electrons from being escaped, a plate-type primary cathode arranged below the upper end shield and fixed to one side of the supporting layer surrounding the center lead, a cylindrical secondary cathode having an elongating slit formed in an outer circumferential surface thereof, through which slit a part of the plate-type primary cathode is outwardly extended beyond the outer circumferential surface of the cylindrical secondary cathode, and a lower end shield engaged to the lower portion of the secondary cathode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.